Coarsely slice 1 medium head cabbage. Steam until tender, but crisp. Drain. Brown 1 1/2 pounds hamburger. Mix with cabbage. Combine 1 cup sour cream, 1 teaspoon salt, 1 cup shredded cheese and pepper. Add to hamburger mixture and spread in a buttered shallow baking dish. Cover with buttered bread crumbs, and bake at 350 degrees for 30 minutes or until nicely browned. Serves 8.